/************************************************************************************
 * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University
 * All rights reserved.
 * Refer to LICENSE for terms and conditions of use.
 ***********************************************************************************/
package vnsim.applications.vitp.utils;


import java.util.*;

import vnsim.vehicular.simulator.RouteSegment;


public abstract class VITPMessage implements java.io.Serializable {
	
	/** <code>serialVersionUID</code> */
	private static final long serialVersionUID = -5883719321862303634L;

	protected String versionNumber="1.0"; //protocol version

	public RouteSegment source; //message source
	public RouteSegment dest;   //message dest

	protected Date initialTime;  //initial issuing time of message
	protected Date expirationTime; //expiration time of message

	protected String cacheControl; //not used for now

	protected int msgId;  //unique message identifier
	
	protected static int VITP_IDINVAL=-1;
	
//	protected int contentLength; //length of body

	protected String msgBody; //actual message body

	protected static int VITP_NOTYPE=0;
	protected static int VITP_REQ=1;
	protected static int VITP_REP=2;

	protected int type=VITP_NOTYPE; //VITPRequest or VITPReply

	public boolean isRequest(){
		if(type==VITP_REQ)
			return true;
		return false;
	}

	public boolean isReply(){
		if(type==VITP_REP)
			return true;
		return false;
	}

	protected VITPMessage(	short roadIdDst, short fromDst, short toDst,
							short roadIdSrc, short fromSrc, short toSrc,
						Date initialTime, Date expirationTime, 
						String cacheControl,
						int msgId, 
						String msgBody){

//		this.roadIdDest=roadIdDest;
//		this.segIdDest=segIdDest;
//		this.roadIdSrc=roadIdSrc;
//		this.segIdSrc=segIdSrc;


//		this.dest=new SegmentID(-1,segIdDest,lat1dest,long1dest,lat2dest,long2dest);
//		this.source=new SegmentID(-1,segIdSrc, lat1src, long1src, lat2src, long2src);

//		this.dest=new RouteSegment(road1IdxDst, pt1IdxDest, road2IdxDst, pt2IdxDest);
//		this.source=new RouteSegment(road1IdxSrc, pt1IdxSrc, road2IdxSrc, pt2IdxSrc);

		this.dest=new RouteSegment(roadIdDst, fromDst, toDst);
		this.source=new RouteSegment(roadIdSrc, fromSrc, toSrc);

		this.initialTime=initialTime;
		this.expirationTime=expirationTime;
		this.cacheControl=cacheControl;
		this.msgId=msgId;
		this.msgBody=msgBody;
	}

	public String toString(){
		String ret="";
//		ret=ret+"Src:[ ("+source.latP1+","+source.longP1+")--("+source.latP2+","+source.longP2+")] ";
//		ret=ret+"Dst:[ ("+dest.latP1+","+dest.longP1+")--("+dest.latP2+","+dest.longP2+")] ";

		ret=ret+"Src:["+source+"] ";
//		ret=ret+"Dst:[FROM SEG="+dest.rdIdx1+  "; P"+dest.ptIdx1+  " To SEG"+dest.rdIdx2+  " P"+dest.ptIdx2+  "] ";
		ret=ret+"Dst:["+dest+"] ";

		if(isRequest()) ret=ret+"REQ-";
		else if(isReply()) ret=ret+"REP-";
		else ret=ret+"NO_TYPE-";
		ret=ret+"Id:"+msgId;
		ret=ret+"Body:--"+msgBody+"--";
		return ret;
	}

	public void setMsgId(int id){
		msgId=id;
	}

	public int getId(){
		return msgId;
	}

	public void setMsgIdInval(){
		msgId=VITP_IDINVAL;
	}

	public boolean isIdInval(){
		if (msgId==VITP_IDINVAL)
			return true;
		return false;
	}

	public RouteSegment getDest(){
		return dest;
	}

	public RouteSegment getSource(){
		return source;
	}

	public void addToBody(String s) {
		if(msgBody==null) msgBody="";
		if(!msgBody.endsWith("\n"))
			msgBody=msgBody+"\n";
		msgBody=msgBody+s+"\n";
	}

	public String getBody(){
		return msgBody;
	}

	public VITPReply getReversedVITP(){
		//gets a VITPReply, by inverting source and destination of this message (copies body and id)

		VITPReply ret=new VITPReply(source.roadIndex,source.pt2, source.pt1, dest.roadIndex, dest.pt2, dest.pt1,
						new Date(), new Date(), "none", msgId, msgBody, 0, "OK");
		return ret;
	}

	public abstract String getUserFriendlyText();
}